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1 | /* |
1 | /* |
2 | * Copyright (c) 2006 Martin Decky |
2 | * Copyright (c) 2006 Martin Decky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup genericmm |
29 | /** @addtogroup genericmm |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** |
33 | /** |
34 | * @file |
34 | * @file |
35 | * @brief RAM disk support. |
35 | * @brief RAM disk support. |
36 | * |
36 | * |
37 | * Support for RAM disk images. |
37 | * Support for RAM disk images. |
38 | */ |
38 | */ |
39 | 39 | ||
40 | #include <lib/rd.h> |
40 | #include <lib/rd.h> |
41 | #include <byteorder.h> |
41 | #include <byteorder.h> |
42 | #include <mm/frame.h> |
42 | #include <mm/frame.h> |
43 | #include <sysinfo/sysinfo.h> |
43 | #include <sysinfo/sysinfo.h> |
44 | #include <ddi/ddi.h> |
44 | #include <ddi/ddi.h> |
45 | #include <align.h> |
45 | #include <align.h> |
46 | 46 | ||
47 | static parea_t rd_parea; /**< Physical memory area for rd. */ |
47 | static parea_t rd_parea; /**< Physical memory area for rd. */ |
48 | 48 | ||
49 | /** |
49 | /** |
50 | * RAM disk initialization routine. At this point, the RAM disk memory is shared |
50 | * RAM disk initialization routine. At this point, the RAM disk memory is shared |
51 | * and information about the share is provided as sysinfo values to the |
51 | * and information about the share is provided as sysinfo values to the |
52 | * userspace tasks. |
52 | * userspace tasks. |
53 | */ |
53 | */ |
54 | int init_rd(rd_header_t *header, size_t size) |
54 | int init_rd(rd_header_t *header, size_t size) |
55 | { |
55 | { |
56 | /* Identify RAM disk */ |
56 | /* Identify RAM disk */ |
57 | if ((header->magic[0] != RD_MAG0) || (header->magic[1] != RD_MAG1) || |
57 | if ((header->magic[0] != RD_MAG0) || (header->magic[1] != RD_MAG1) || |
58 | (header->magic[2] != RD_MAG2) || (header->magic[3] != RD_MAG3)) |
58 | (header->magic[2] != RD_MAG2) || (header->magic[3] != RD_MAG3)) |
59 | return RE_INVALID; |
59 | return RE_INVALID; |
60 | 60 | ||
61 | /* Identify version */ |
61 | /* Identify version */ |
62 | if (header->version != RD_VERSION) |
62 | if (header->version != RD_VERSION) |
63 | return RE_UNSUPPORTED; |
63 | return RE_UNSUPPORTED; |
64 | 64 | ||
65 | uint32_t hsize; |
65 | uint32_t hsize; |
66 | uint64_t dsize; |
66 | uint64_t dsize; |
67 | switch (header->data_type) { |
67 | switch (header->data_type) { |
68 | case RD_DATA_LSB: |
68 | case RD_DATA_LSB: |
69 | hsize = uint32_t_le2host(header->header_size); |
69 | hsize = uint32_t_le2host(header->header_size); |
70 | dsize = uint64_t_le2host(header->data_size); |
70 | dsize = uint64_t_le2host(header->data_size); |
71 | break; |
71 | break; |
72 | case RD_DATA_MSB: |
72 | case RD_DATA_MSB: |
73 | hsize = uint32_t_be2host(header->header_size); |
73 | hsize = uint32_t_be2host(header->header_size); |
74 | dsize = uint64_t_be2host(header->data_size); |
74 | dsize = uint64_t_be2host(header->data_size); |
75 | break; |
75 | break; |
76 | default: |
76 | default: |
77 | return RE_UNSUPPORTED; |
77 | return RE_UNSUPPORTED; |
78 | } |
78 | } |
79 | 79 | ||
80 | if ((hsize % FRAME_SIZE) || (dsize % FRAME_SIZE)) |
80 | if ((hsize % FRAME_SIZE) || (dsize % FRAME_SIZE)) |
81 | return RE_UNSUPPORTED; |
81 | return RE_UNSUPPORTED; |
82 | 82 | ||
83 | if (hsize > size) |
83 | if (hsize > size) |
84 | return RE_INVALID; |
84 | return RE_INVALID; |
85 | 85 | ||
86 | if ((uint64_t) hsize + dsize > size) |
86 | if ((uint64_t) hsize + dsize > size) |
87 | dsize = size - hsize; |
87 | dsize = size - hsize; |
88 | 88 | ||
89 | rd_parea.pbase = ALIGN_DOWN((uintptr_t) KA2PA((void *) header + hsize), |
89 | rd_parea.pbase = ALIGN_DOWN((uintptr_t) KA2PA((void *) header + hsize), |
90 | FRAME_SIZE); |
90 | FRAME_SIZE); |
91 | rd_parea.vbase = (uintptr_t) ((void *) header + hsize); |
- | |
92 | rd_parea.frames = SIZE2FRAMES(dsize); |
91 | rd_parea.frames = SIZE2FRAMES(dsize); |
93 | rd_parea.cacheable = true; |
- | |
94 | ddi_parea_register(&rd_parea); |
92 | ddi_parea_register(&rd_parea); |
95 | 93 | ||
96 | sysinfo_set_item_val("rd", NULL, true); |
94 | sysinfo_set_item_val("rd", NULL, true); |
97 | sysinfo_set_item_val("rd.header_size", NULL, hsize); |
95 | sysinfo_set_item_val("rd.header_size", NULL, hsize); |
98 | sysinfo_set_item_val("rd.size", NULL, dsize); |
96 | sysinfo_set_item_val("rd.size", NULL, dsize); |
99 | sysinfo_set_item_val("rd.address.physical", NULL, |
97 | sysinfo_set_item_val("rd.address.physical", NULL, |
100 | (unative_t) KA2PA((void *) header + hsize)); |
98 | (unative_t) KA2PA((void *) header + hsize)); |
101 | 99 | ||
102 | return RE_OK; |
100 | return RE_OK; |
103 | } |
101 | } |
104 | 102 | ||
105 | /** @} |
103 | /** @} |
106 | */ |
104 | */ |
107 | 105 |